I am very optimistic for this side of railway preservation. Whilst we (preservationists collectively) still have big issues with rolling stock storage etc, I have noticed that over the past 10 years that I have been involved there has been an increasing number of projects around the UK aimed at sustainability of rolling stock, firstly of locomotives but later "tricking down" to carriages. The best examples of this are the many carriage sheds that have sprung up, which as we all know will keep carriages going (in the bodywork dept) many times longer than when they're stood outside. We're even starting to see accommodation for "stored" rolling stock (engine house, IOWSR etc) which previously was very rare. Whilst we have undoubtedly got a long way to go (the mission will never be finished!) I do believe that we will one day see wagon sheds for example, an idea that was once (and perhaps still is) considered crazy. The point I'm trying to make is if some railways continue go in this direction more favoured by bus/tram museums (where 100% of the collection is housed undercover) then outside places such as goods yards will hopefully one day be empty enough to fulfil their "true" preservation role, with a wagon here, a wagon there. It is nice to see a line which can "hide" their four rakes of Mk1's (essential for those gala/Thomas days) in a nice dry carriage shed at one end of the line while the rest of the railway can then recreate the classic sleepy branch line. Although as an enthusiast I like to be able to see as much as I can when I visit (including rotters!), being involved in preservation I'd rather know they were tucked away in a dry shed better protected.